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MARIN COUNTY LOCAL HAZARD MITIGATION PLAN 2012 Update 0 Prepared By: MARIN COUNTY SHERIFF’S OFFICE OF EMERGENCY SERVICES 3501 Civic Center Drive, Room 266 San Rafael, CA 94903 www.readymarin.org In partnership with: Marin County Fire Department Marin County Department of Public Works Marin County Community Development Agency TABLE OF CONTENTS EXECUTIVE SUMMARY .......................................................................................................................................... 1 Marin County Operational Area ............................................................................................................................... 2 Strategies .................................................................................................................................................................... 3 Jurisdiction Vulnerability- Major And Minor Hazards ............................................................................................ 4 Earthquake - Major ................................................................................................................................................... 4 Fire - Major ............................................................................................................................................................... 5 Flood - Major ............................................................................................................................................................ 5 Other Hazards - Minor .............................................................................................................................................. 5 Section 1: Risk Assessment - Major ....................................................................................................................... 7 Earthquake ............................................................................................................................................................... 7 Fire .......................................................................................................................................................................... 14 Flood ....................................................................................................................................................................... 35 Other Hazards - Minor ............................................................................................................................................ 43 Section 2: Hazard Mitigation .................................................................................................................................. 49 Planning and Goals ................................................................................................................................................. 49 Earthquake ............................................................................................................................................................. 50 Fire .......................................................................................................................................................................... 52 Flood ....................................................................................................................................................................... 59 Agriculture .............................................................................................................................................................. 66 Terrorism ................................................................................................................................................................ 67 Tsunami .................................................................................................................................................................. 68 Landslides ............................................................................................................................................................... 69 Section 3: Planning Reference .............................................................................................................................. 71 Regional Planning ................................................................................................................................................... 71 MARIN COUNTY OPERATIONAL AREA .................................................................................................................... 71 Workshops/Public Involvement ............................................................................................................................. 72 Monitoring, Evaluating and Updating the Plan ...................................................................................................... 73 EXECUTIVE SUMMARY This Hazard Mitigation Plan is the product of an ongoing planning process undertaken by the County of Marin. The purpose is to meet the requirements of the Disaster Mitigation Act of 2000 (DMA) - (Public Law 106-3900) and thereby maintain continued eligibility for certain Hazard Mitigation – or disaster loss reduction – programs from the Federal Emergency Management Agency (FEMA), part of the Department of Homeland Security. The Interim Final Rule published in the Federal Register on February 26, 2002 and October 1, 2002 established mitigation planning requirements for local governments. The Marin County Local Hazard Mitigation Plan (LHMP) describes strategies for sustaining and building on current mitigation activities to ensure the future safety of lives, preservation of property, and protection of the environment during times of disaster. State and Federal guidance also encourages mitigation planning to address man-made hazards including terrorism. This plan includes terrorism only broadly since mitigation for this hazard is addressed by other agencies operating at a higher level of security. Mitigation planning will improve the ability to recover after disaster. The LHMP is based on critical data with a focus on Hazard Identification, Vulnerability Analysis, and Mitigation Strategies, with a breakout of the major and minor hazards. The major hazards include significant risk detail. The minor hazards are less detailed, using a broader approach. 1 Marin County Operational Area Marin County is located on the central coast of California, north of the Golden Gate Bridge. It is part of the California Emergency Management Agency (CalEMA) Coastal Region. Marin County covers 521 square miles with a population of over 250,000 in eleven incorporated cities and towns and the county’s unincorporated area. Most of the population is located in the urban corridor located along the east-central part of the county, adjacent to Highway 101. Marin County plays a large part in the economy of the San Francisco Bay Area. Marin County is surrounded by water on three sides: the Pacific Ocean on the west, the San Pablo Bay on the east and the San Francisco Bay on the south. It is adjacent to Sonoma County on the north. Marin County is connected to its surrounding neighbors by bridges. The Golden Gate Bridge is to the south; the Richmond/San Rafael Bridge is to the east; State Highway 37 is to the north east (along the north part of San Pablo Bay across filled bay land); and Highway 101 is to the north (which narrows to a 4-lane uncontrolled road that transverses the Antonio Creek). One of the major problems Marin County faces during any emergency is the possibility of being isolated from the surrounding communities and any resources or help. Planning Process The process for updating the Marin County Local Hazard Mitigation Plan (LHMP) began in January 2012 and follows the FEMA prescribed methodology.. Various forums and meetings defined the scope of the work for the Local Hazard Mitigation Plan to update the recorded history of losses from natural hazards, and to update the analysis of future risks posed to the county by these hazards. The risk assessment portion of the plan was defined and specific recommendations for actions to mitigate future disaster losses were identified (Section 2 – Hazard Mitigation). The update team consisted of four lead departments/agencies who were each responsible for outreach to their stakeholders, subject matter experts, and constituents, as well as the elements of the LHMP that were specific to their discipline. These leads were: Marin County Sheriff’s Office of Emergency Services (OES), Marin County Fire Department, Marin County Department of Public Works, and the Marin County Community Development Agency. The members of the committees, county department heads, the Disaster and Citizens Corps Council, and the Board of Supervisors are asked to monitor the plan as it is amended, at least annually. Stakeholders will monitor progress on individual projects, will be solicited to provide periodic reports on project development, and will be instrumental in evaluating the goals and objectives for expected outcomes of mitigation projects. Local Planning Mechanisms This plan considers current Marin County planning mechanisms including existing capital improvement plans, zoning, building codes, agency forums, and comprehensive plans for purposes of mitigation projects and activities. Key components of major plans are integrated in 2 this LHMP. Marin Countywide Plan The Marin Countywide Plan 2007, developed by the Marin County Community Development Agency, is a long range general plan that includes a significant section on environmental